package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.minio.MinioProperties;
import com.atguigu.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {
    @Autowired
    private MinioClient minioClient;
    @Autowired
    private MinioProperties minioProperties;

    // 文件上传
    @Override
    public String upload(MultipartFile file) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {

            // 检查桶是否存在
            boolean bucketExists = minioClient.bucketExists(BucketExistsArgs.builder().bucket(minioProperties.getBucketName()).build());
            // 如果不存在就创建桶
            if (!bucketExists) {
                // 创建桶
                minioClient.makeBucket(MakeBucketArgs.builder().bucket(minioProperties.getBucketName()).build());
                //设置桶的策略
                minioClient.setBucketPolicy(SetBucketPolicyArgs.builder()
                        .bucket(minioProperties.getBucketName())
                        .config(createBucketPolicyConfig(minioProperties.getBucketName()))
                        .build());
            }

            // 定义上传文件的唯一文件名
            String filename = new SimpleDateFormat("yyyyMMdd").format(new Date()) + "/" + UUID.randomUUID() + "-" + file.getOriginalFilename();
            // 文件上传
            minioClient.putObject(
                    PutObjectArgs.builder()
                            .bucket(minioProperties.getBucketName())
                            .object(filename)
                            .stream(file.getInputStream(),file.getSize(),-1)
                            .contentType(file.getContentType())
                            .build());
            // 返回的是文件URL地址
            //return minioProperties.getEndpoint() + "/" + minioProperties.getBucketName() + "/" +filename;
            return String.join("/",minioProperties.getEndpoint(),minioProperties.getBucketName(),filename);




    }


    // 桶的策略字符串
    private String createBucketPolicyConfig(String bucketName) {

        return """
            {
              "Statement" : [ {
                "Action" : "s3:GetObject",
                "Effect" : "Allow",
                "Principal" : "*",
                "Resource" : "arn:aws:s3:::%s/*"
              } ],
              "Version" : "2012-10-17"
            }
            """.formatted(bucketName);
    }


}
